Abstract
Recently, a variety of chaos-based image encryption algorithms adopting the traditional permutation-diffusion structure have been suggested. Most of these algorithms cannot resist the powerful chosen-plaintext attack and chosen-ciphertext attack efficiently for less sensitivity to plain-image. This paper presents a symmetric color image encryption system based on plaintext-related random access bit-permutation mechanism (PRRABPM). In the proposed scheme, a new random access bit-permutation mechanism is used to shuffle 3D bit matrix transformed from an original color image, making the RGB components of the color image interact with each other. Furthermore, the key streams used in random access bit-permutation mechanism operation are extremely dependent on plain image in an ingenious way. Therefore, the encryption system is sensitive to tiny differences in key and original images, which means that it can efficiently resist chosen-plaintext attack and chosen-ciphertext attack. In the diffusion stage, the previous encrypted pixel is used to encrypt the current pixel. The simulation results show that even though the permutation-diffusion operation in our encryption scheme is performed only one time, the proposed algorithm has favorable security performance. Considering real-time applications, the encryption speed can be further improved.
Highlights
With the dramatic development of Internet technology, a great deal of sensitive information conveyed by digital images has been transmitted over public networks
For color image encryption, bit-level permutation-based encryption algorithms have the advantages that they can achieve the interaction between RGB components in the scrambling phase, which can improve the security of encryption
Based on the analysis above, this paper presents a new symmetric color image encryption system based on a plaintext-related random access bit-permutation mechanism (PRRABPM)
Summary
With the dramatic development of Internet technology, a great deal of sensitive information conveyed by digital images has been transmitted over public networks. For color image encryption, bit-level permutation-based encryption algorithms have the advantages that they can achieve the interaction between RGB components in the scrambling phase, which can improve the security of encryption. For most chaotic-based image encryption schemes, the relationship between permutation stage, diffusion stage, and the plaintext image is independent Such algorithms have the following security flaws: (1) the architecture is insensitive to the original image; (2) the statistical property of the original image can be observed once the diffusion key or diffusion sequence is cracked;. Based on the analysis above, this paper presents a new symmetric color image encryption system based on a plaintext-related random access bit-permutation mechanism (PRRABPM). Bit-level permutation-based encryption algorithms have the advantages that they can achieve the interaction between RGB components in the scrambling phase, which can improve the security of encryption.
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